A review of the National Institutes of Health funding history for urolithiasis shows that support has increased from about $3 million in 1990 to about $4.7 million in 1993 and to an estimated $5.1 million in 1994.

The award of large project grants accounts for the increase : individual research project grant funding (R01-type grants) has not increased.

The overall funding for urologic research supported by the National Institute of Diabetes and Digestive and Kidney Diseases has more than doubled in this same period, with most of the increase attributable to the award of individual research grants.

Although there has been a significant number of urolithiasis research grant applications submitted in this time period, the percent of successful (funded) applications continues to lag behind the number in other urology-related areas.

Strategies for improving the award rate for urolithiasis-related research grant applications are reviewed.